The Christmas season, also called the festive season, or the holiday season (mainly in the U.S. and Canada; often simply called the holidays),, is an annually recurring period recognized in many Western and Western-influenced countries that is generally considered to run from late November to early January.

Guerrilla warfare is a form of irregular warfare in which a small group of combatants, such as paramilitary personnel, armed civilians, or irregulars, use military tactics including ambushes, sabotage, raids, petty warfare, hit-and-run tactics, and mobility to fight a larger and less-mobile traditional military.

The M1917 Browning machine gun is a heavy machine gun used by the United States armed forces in World War I, World War II, Korea, and to a limited extent in Vietnam; it has also been used by other nations.

The Browning Automatic Rifle (BAR) is a family of American automatic rifles and machine guns used by the United States and numerous other countries during the 20th century. The primary variant of the BAR series was the M1918, chambered for the.30-06 Springfield rifle cartridge and designed by John Browning in 1917 for the U.S. Expeditionary Corps in Europe as a replacement for the French-made Chauchat and M1909 Benét–Mercié machine guns that US forces had previously been issued. The BAR was designed to be carried by infantrymen during an assault Article by Maxim Popenker, 2014. advance while supported by the sling over the shoulder, or to be fired from the hip. This is a concept called "walking fire" — thought to be necessary for the individual soldier during trench warfare.Chinn, George M.: The Machine Gun, Volume I: History, Evolution, and Development of Manual, Automatic, and Airborne Repeating Weapons, p. 175. Bureau of Ordnance, Department of the Navy, 1951. The BAR never entirely lived up to the original hopes of the war department as either a rifle or a machine gun. The U.S. Army, in practice, used the BAR as a light machine gun, often fired from a bipod (introduced on models after 1938).Bishop, Chris: The Encyclopedia of Weapons of World War II, p. 239. Sterling Publishing, 2002. A variant of the original M1918 BAR, the Colt Monitor Machine Rifle, remains the lightest production automatic gun to fire the.30-06 Springfield cartridge, though the limited capacity of its standard 20-round magazine tended to hamper its utility in that role. Although the weapon did see some action in World War I, the BAR did not become standard issue in the US Army until 1938, when it was issued to squads as a portable light machine gun. The BAR saw extensive service in both World War II and the Korean War and saw limited service in the Vietnam War. The US Army began phasing out the BAR in the late 1950s, when it was intended to be replaced by a squad automatic weapon (SAW) variant of the M14, and was without a portable light machine gun until the introduction of the M60 machine gun in 1957. The M60, however, was really a general-purpose machine gun (GPMG) and was used as a SAW only because the army had no other tool for the job until the M249 Squad Automatic Weapon in the mid-1980s.

The M79 grenade launcher is a single-shot, shoulder-fired, break-action grenade launcher that fires a 40×46mm grenade, which uses what the US Army calls the High-Low Propulsion System to keep recoil forces low, and first appeared during the Vietnam War.

In the Gregorian calendar, New Year's Eve (also known as Old Year's Day or Saint Sylvester's Day in many countries), the last day of the year, is on 31 December which is the seventh day of Christmastide.

The Thompson submachine gun is an American submachine gun, invented by John T. Thompson in 1918, that became infamous during the Prohibition era, becoming a signature weapon of various organized crime syndicates in the United States.

The United States Marine Corps (USMC), also referred to as the United States Marines, is a branch of the United States Armed Forces responsible for conducting amphibious operations with the United States Navy.

A wetsuit is a garment, usually made of foamed neoprene, which is worn by surfers, divers, windsurfers, canoeists, and others engaged in water sports and other activities in or on water, providing thermal insulation, abrasion resistance and buoyancy.

2019 (MMXIX) will be a common year starting on Tuesday of the Gregorian calendar, the 2019th year of the Common Era (CE) and Anno Domini (AD) designations, the 19th year of the 3rd millennium, the 19th year of the 21st century, and the 10th and last year of the 2010s decade.

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